01: /*
02: * JBoss, Home of Professional Open Source.
03: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
04: * as indicated by the @author tags. See the copyright.txt file in the
05: * distribution for a full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * published by the Free Software Foundation; either version 2.1 of
10: * the License, or (at your option) any later version.
11: *
12: * This software is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this software; if not, write to the Free
19: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21: */
22: package org.jboss.resource.adapter.jms.inflow.dlq;
23:
24: import javax.jms.Message;
25: import javax.naming.Context;
26:
27: import org.jboss.resource.adapter.jms.inflow.JmsActivation;
28:
29: /**
30: * A DLQ Handler that knows about JBossMQ redelivery properties
31: *
32: * @author <a href="adrian@jboss.com">Adrian Brock</a>
33: * @version $Revision: 57189 $
34: */
35: public class JBossMQDLQHandler extends AbstractDLQHandler {
36: /** Properties copied from org.jboss.mq.SpyMessage */
37: protected static final String JMS_JBOSS_REDELIVERY_COUNT = "JMS_JBOSS_REDELIVERY_COUNT";
38:
39: /** Properties copied from org.jboss.mq.SpyMessage */
40: protected static final String JMS_JBOSS_REDELIVERY_LIMIT = "JMS_JBOSS_REDELIVERY_LIMIT";
41:
42: /** The maximum number of resends */
43: protected int maxResent;
44:
45: public void setup(JmsActivation activation, Context ctx)
46: throws Exception {
47: super .setup(activation, ctx);
48: maxResent = activation.getActivationSpec().getDLQMaxResent();
49: }
50:
51: protected boolean handleDelivery(Message msg) {
52: int max = maxResent;
53: try {
54: if (msg.propertyExists(JMS_JBOSS_REDELIVERY_LIMIT))
55: max = msg.getIntProperty(JMS_JBOSS_REDELIVERY_LIMIT);
56:
57: if (msg.propertyExists(JMS_JBOSS_REDELIVERY_COUNT)) {
58: int count = msg
59: .getIntProperty(JMS_JBOSS_REDELIVERY_COUNT);
60:
61: if (count > max) {
62: warnDLQ(msg, count, max);
63: return true;
64: }
65: }
66: } catch (Throwable t) {
67: log.warn("Unexpected error retrieving message properties "
68: + msg, t);
69: }
70: return false;
71: }
72: }
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